Stacking Engineering of Heterojunctions in Half-Metallic Carbon Nitride for Efficient CO Photoreduction

Overview

Journal Adv Sci (Weinh)

Specialty Biomedical Engineering

Date 2023 Dec 10

PMID 38072660

Authors

Xingwang Zhu

Hangmin Xu

Jinyuan Liu

Chuanzhou Bi

Jianfeng Tian

Kang Zhong

Bin Wang

Penghui Ding

Xiaozhi Wang

Paul K Chu

Hui Xu

Jianning Ding

Affiliations

Soon will be listed here.

Abstract

Enhancing charge separation in semiconductor photocatalysts is a major challenge for efficient artificial photosynthesis. Herein, a compact heterojunction is designed by embedding half-metallic C(CN) (hm-CN) hydrothermally in BiOBr (BOB) as the backbone. The interface between hm-CN and BOB is seamless and formed by covalent bonding to facilitate the transmission of photoinduced electrons from BOB to hm-CN. The transient photocurrents and electrochemical impedance spectra reveal that the modified composite catalyst exhibits a larger electron transfer rate. The photocatalytic activity of hm-CN/BOB increases significantly as indicated by a CO yield that is about four times higher than that of individual components. Density-functional theory calculations verify that the heterojunction improves electron transport and decreases the reaction energy barrier, thus promoting the overall photocatalytic CO conversion efficiency. The half-metal nitride coupled semiconductor heterojunctions might have large potential in artificial photosynthesis and related applications.

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Stacking Engineering of Heterojunctions in Half-Metallic Carbon Nitride for Efficient CO Photoreduction.

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